Anxietas inspirata B.A. Marshall, 1991
Quinnia ionica (R.B. Watson, 1878)
Seguenzia iota B.A. Marshall, 1991
Seguenzia keikoae G.T. Poppe, S.P. Tagaro& H. Dekker, 2006
Quinnia laetifica B.A. Marshall, 1991
Rotellenzia lampra (R.B. Watson, 1879)
Calliobasis lapulapui G.T. Poppe, S.P. Tagaro& H. Dekker, 2006
Fluxinella lenticulosa B.A. Marshall, 1983
Fluxinella lepida B.A. Marshall, 1983
Seguenzia levii B.A. Marshall, 1991
Quinnia limatula B.A. Marshall, 1991
Seguenzia lineata R.B. Watson, 1879
Seguenzia louiseae A.H. Clarke, 1961
Visayaseguenzia maestratii G.T. Poppe, S.P. Tagaro& H. Dekker, 2006
Calliobasis magellani G.T. Poppe, S.P. Tagaro& H. Dekker, 2006
Fluxinella marginata (M.M. Schepman, 1909)
Seguenzia matara B.A. Marshall, 1988
Fluxinella maxwelli (FOSSIL) B.A. Marshall, 1983 †
Seguenzia megaloconcha E.J. Rokop, 1972
Fluxinella megalomphala B.A. Marshall, 1991
Carenzia melvilli (M.M. Schepman, 1909)
Fluxinella membranacea B.A. Marshall, 1991
Calliobasis merista B.A. Marshall, 1991
Sericogyra metallica B.A. Marshall, 1988
Seguenzia metivieri B.A. Marshall, 1991
Seguenzia mirabilis T.A. Okutani, 1964
Calliobasis miranda B.A. Marshall, 1983
Seguenzia monocingulata (FOSSIL) G. Seguenza, 1876 †
Asthelys munda (R.B. Watson, 1879)
Calliobasis nepticula B.A. Marshall, 1991
Seguenzia nipponica T.A. Okutani, 1964
Carenzia nitens B.A. Marshall, 1991
Seguenzia nitida A.E. Verrill, 1884
Asthelys nitidula B.A. Marshall, 1991
Seguenzia occidentalis W.H. Dall, 1908